Chinese President Xi Jinping (R) meets with Serbian President Tomislav Nikolic (L) in Belgrade, Serbia, June 17, 2016. Photo: Xinhua

Chinese President Xi Jinping (1st R) and his wife Peng Liyuan (2nd R) pose for a group photo with Serbian President Tomislav Nikolic (1st L) and his wife Dragica Nikolic in Belgrade, Serbia, June 17, 2016. Xi Jinping met with Tomislav Nikolic in Belgrade on Friday. Photo: Xinhua

Chinese President Xi Jinping (L) receives a souvenir from Serbian President Tomislav Nikolic in Belgrade, Serbia, June 17, 2016. Xi Jinping met with Tomislav Nikolic in Belgrade on Friday. Photo: Xinhua

Chinese President Xi Jinping (2nd L) and his wife Peng Liyuan (1st L) pose for a group photo with Serbian President Tomislav Nikolic (2nd R) and his wife Dragica Nikolic in Belgrade, Serbia, June 17, 2016. Xi Jinping met with Tomislav Nikolic in Belgrade on Friday. Photo: Xinhua

Chinese President Xi Jinping (4th L Back) and his wife Peng Liyuan (3rd L) pose for a group photo with Serbian President Tomislav Nikolic (4th R Back) and his wife Dragica Nikolic (3rd R Back) and their family members in Belgrade, Serbia, June 17, 2016. Xi Jinping met with Tomislav Nikolic in Belgrade on Friday. Photo: Xinhua